1. Follow the normal maintenance procedures to clean all lenses and all three mirrors. Make sure the laser path is perfectly aligned. If the laser performance is still subpar, follow up the steps below to troubleshoot.

2. On the panel, set the maximum and minimum power to 45.

3. Attach four layers of dimmer tape to the 3rd mirror.

4. Move the laser head to the middle position of its engraving area.

5. Use the PULSE key to fire the laser and check,

• The emission of the laser tube
• The power supply indicator
• The light spots on the tape

When the laser emission is weak or appears purple-ish, or if the laser tube color appears normal (pink), but the spot on the dimmer tape is shallow (intact tape, the spot is not full, donut spot, etc.), then check the current value of the power supply.

• If the current value is about 10mA, replace the laser tube.
• If the current value is less than 5mA.

Unplug the laser control terminal (6-pin terminal) on the power supply. Press the test button on the power supply or the test button on the external ammeter (if applicable) to see the current value.

• If the current value is still less than 5mA, see Ceramic resistor test>> to sort out the faulty component.
• If the current value has reached about 10mA and the laser tube is emitting light normally, measure the voltage between IN and GND (as shown) of the laser power supply control terminal with the PULSE key pressed (normally about 2V). If the voltage is normal, replace the laser power supply with a new, identical one. If the voltage is too low, replace the mainboard with a new, identical one.

If the laser tube glows white, replace the laser tube with a new, identical one.

If the color appears normal, but the spot is split, replace the laser tube with a new, identical one.

If the spot is full, check the list below.

• Whether the material is too thick.
• Whether the speed is too fast.
• Whether the power is set too low.
• Whether the material is laserable.
• Whether the weakened performance is within the expected power loss over normal use.